Novel bearing installation tool

Abstract

The utility model relates to a novel bearing installation tool which is simple in structure, low in production cost, lighter in overall mass, safer to use, smaller in space required by use, good in bearing installation accuracy and long in service life. The symmetric center line of the round hole coincides with the symmetric center line of the round through hole, the diameter of the round hole is smaller than that of the round through hole, the bearing guard bullet is composed of a first cylindrical section and a second cylindrical section, a tail cover is arranged at the rear end of the round through hole in the cylinder, and a spring is arranged in the round through hole of the cylinder. One end of the spring abuts against the inner side face of the first cylindrical section, the other end of the spring abuts against the inner side face of the tail cover, and at the moment, the front end of the second cylindrical section extends out of the front end face of the cylinder. The tool has the advantages that firstly, the tool is simple in structure, low in production cost, lighter in overall mass, safer to use and smaller in use space; and secondly, the tool is good in bearing installation accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of speed reducer manufacturing technology, specifically relating to a new type of bearing installation fixture. Background Technology

[0002] CN 211193718 U, entitled "A Bearing Installation Fixture", includes a base, a lower pad, a guide rod, a spring, and an upper pressure block. A sample is placed on a support mechanism composed of the base, lower pad, guide rod, and spring. The upper pressure block presses the bearing into the sample, allowing the bearing to mate with the sample. The lower pad has a hole. When the upper pressure block presses down on the bearing, it also presses down on the guide rod. The guide rod will partially retract from the hole in the lower pad, but due to the action of the guide rod spring, it can spring back, restoring the fixture to its original position. Its shortcomings are as follows: one end of the guide rod in this type of bearing mounting fixture extends beyond the upper end face of the base (the protruding part of the rod is used to fit the bearing to be installed), and the lower end of the guide rod is located in a reserved hole in the lower pad. Since the guide rod needs to be relatively long, the use of more guide rod material not only increases the overall quality of the bearing mounting fixture, but also increases the production cost of the bearing mounting fixture. In addition, when the upper pressure block presses down on the bearing, it also presses down on the guide rod at the same time, and the guide rod will come out part of the hole in the lower pad. That is, the guide rod in this type of bearing mounting fixture will protrude from the lower pad when in use. This not only poses a safety hazard, but also requires more space when the bearing mounting fixture is in use. Utility Model Content

[0003] Design objective: To overcome the shortcomings of the prior art, a new type of bearing installation fixture is designed that is not only simple in structure and low in production cost, but also lighter in overall weight, safer to use, requires less space, has good bearing installation accuracy, and has a long service life.

[0004] Design Scheme: To achieve the above design objectives, 1. A partition is provided at the front end of the circular through hole in the cylinder. A circular hole is provided on the outer side of the partition, and the circular hole penetrates both the inner and outer sides of the partition. The center line of symmetry of the circular hole coincides with the center line of symmetry of the circular through hole, and the diameter of the circular hole is smaller than the diameter of the circular through hole. The bearing stop spring is composed of a first cylindrical segment and a second cylindrical segment, and the first and second cylindrical segments are integral structures. The center lines of symmetry of the first and second cylindrical segments coincide. The diameter of the first cylindrical segment matches the diameter of the circular through hole, and the diameter of the second cylindrical segment matches the diameter of the circular hole, and the length of the second cylindrical segment is greater than the length of the circular hole. A tail cap is provided at the rear end of the circular through hole in the cylinder. A spring is provided inside the circular through hole of the cylinder. One end of the spring abuts against the inner side of the first cylindrical segment, and the other end of the spring abuts against the inner side of the tail cap. At this time, the design of the front end of the second cylindrical segment extending out of the front end face of the cylinder is one of the technical features of this utility model. The purpose of this design is as follows: The front end of the circular through-hole in the cylinder is provided with a partition; the outer side of the partition has a circular hole that penetrates both the inner and outer sides of the partition; the center line of symmetry of the circular hole coincides with the center line of symmetry of the circular through-hole, and the diameter of the circular hole is smaller than the diameter of the circular through-hole; the bearing stop head is composed of a first cylindrical segment and a second cylindrical segment, and the first and second cylindrical segments are an integral structure; the center lines of symmetry of the first and second cylindrical segments coincide; the diameter of the first cylindrical segment matches the diameter of the circular through-hole; the diameter of the second cylindrical segment matches the diameter of the circular hole, and the length of the second cylindrical segment is greater than the length of the circular hole; the rear end of the circular through-hole in the cylinder is provided with a tail cap. A spring is installed inside the circular through hole of the cylinder. One end of the spring abuts against the inner side of the first cylindrical section, and the other end of the spring abuts against the inner side of the tail cap. At this time, the front end of the second cylindrical section extends out of the front end face of the cylinder. The T-shaped bearing retainer in this tooling can greatly reduce the material used for the bearing retainer while ensuring its function of working with the spring. This not only greatly reduces the production cost of the new bearing installation tooling, but also reduces the overall weight of the new bearing installation tooling (making it lighter). In addition, when the bearing retainer in this tooling is pressed into the cylinder by the gear shaft, its first cylindrical section is always located inside the cylinder. This not only makes it safer to use, but also requires less space.

[0005] 2. A threaded through hole is provided on the outer circular surface of the second cylindrical segment, and the threaded through hole extends through both sides of the outer circular surface of the second cylindrical segment. The center line of symmetry of the threaded through hole is perpendicular to and intersects the center line of symmetry of the second cylindrical segment. A ball screw is provided in the threaded through hole, and part of the ball body in the ball screw protrudes from the outer circular surface of the second cylindrical segment. Under the action of external force, the ball in the ball screw can retract into the threaded through hole. At this time, the ball spring in the ball screw is compressed by the ball. The design of the ball screw being located on the protruding part of the second cylindrical segment is the second technical feature of this utility model. The purpose of this design is as follows: A threaded through-hole is provided on the outer surface of the second cylindrical section, extending through both sides of the outer surface. The center line of symmetry of the threaded through-hole is perpendicular to and intersects the center line of symmetry of the second cylindrical section. A ball screw is provided inside the threaded through-hole, with part of the ball protruding from the outer surface of the second cylindrical section. Under external force, the ball in the ball screw can retract into the threaded through-hole, compressing the ball spring. The ball screw is located on the protruding section of the second cylindrical section. The head of the ball screw (i.e., the ball) on the protruding section of the second cylindrical section is retractable. When the bearing inner ring is fitted into the bearing retainer, it not only secures the bearing and prevents it from falling off, but also ensures that the bearing and the tooling are on the same axis (i.e., aligned center), resulting in good installation accuracy. Furthermore, it prevents bearing misalignment, collisions, and other adverse conditions during pressing.

[0006] 3. The inner side of the round cover of the tail cap is provided with a circular protrusion, and the round cover and the circular protrusion are integral structures. The center line of symmetry of the round cover coincides with the center line of symmetry of the circular protrusion, and the diameter of the round cover is larger than the diameter of the circular protrusion. The diameter of the circular protrusion matches the diameter of the circular through hole. The upper end face of the round cover is provided with two circular cover through holes, which pass through the upper and lower end faces of the round cover. The two circular cover through holes are located on both sides of the circular protrusion. The outer circular surface of the cylinder is provided with a protruding ring, which is located at the rear end of the cylinder. The upper end face of the protruding ring is provided with two screw holes. The tail cap is fixed to the cylinder by screws after the circular protrusion and the circular through hole are inserted and matched, and the two circular cover through holes are connected to the corresponding screw holes one by one. This is the third technical feature of this utility model. The purpose of this design is as follows: the inner side of the round cover of the tail cap is provided with a circular protrusion, and the round cover and the circular protrusion are integrally structured. The center line of symmetry of the round cover coincides with the center line of symmetry of the circular protrusion, and the diameter of the round cover is larger than the diameter of the circular protrusion. The diameter of the circular protrusion matches the diameter of the circular through hole. The upper end face of the round cover is provided with two circular through holes that penetrate the upper and lower end faces of the round cover. The two circular through holes are located on both sides of the circular protrusion. The outer circumference of the cylinder is provided with a protruding ring located at the rear end of the cylinder. The upper end face of the protruding ring is provided with two screw holes. The tail cap is fixed to the cylinder by screws after the circular protrusion and the circular through holes are inserted and matched, and the two circular through holes are aligned with the corresponding screw holes. This assembly structure of the tail cap and the cylinder not only makes the structure of both more stable, but also improves the overall pressure bearing capacity, thereby increasing the service life of a new type of bearing installation fixture.

[0007] 4. The fourth technical feature of this utility model is that a positioning protrusion is provided on the outer circumference of the cylinder and is located at the front end of the cylinder. The diameter of the positioning protrusion matches the diameter of the bearing mounting hole in the reducer housing. The purpose of this design is that the positioning protrusion plays a pre-installation guiding role in the use of this novel bearing installation fixture, making the fixture more convenient to use.

[0008] Technical Solution: A novel bearing installation fixture includes a cylinder, a tail cap, and a bearing retainer. The front end of the circular through-hole in the cylinder is provided with a partition. A circular hole is provided on the outer side of the partition, penetrating both the inner and outer sides of the partition. The center line of symmetry of the circular hole coincides with the center line of symmetry of the circular through-hole, and the diameter of the circular hole is smaller than the diameter of the circular through-hole. The bearing retainer is composed of a first cylindrical segment and a second cylindrical segment, which are integrally formed. The center lines of symmetry of the first and second cylindrical segments coincide. The diameter of the first cylindrical segment matches the diameter of the circular through-hole, and the diameter of the second cylindrical segment matches the diameter of the circular hole, while the length of the second cylindrical segment is greater than the length of the circular hole. A tail cap is provided at the rear end of the circular through-hole in the cylinder. A spring is installed inside the circular through-hole of the cylinder. One end of the spring abuts against the inner side of the first cylindrical segment, and the other end of the spring abuts against the inner side of the tail cap. At this time, the front end of the second cylindrical segment extends beyond the front end face of the cylinder.

[0009] Compared with the prior art, this utility model has the following advantages: first, the new bearing installation fixture is not only simple in structure and low in production cost, but also lighter in overall weight, safer to use, and requires less space; second, the new bearing installation fixture has good bearing installation accuracy; and third, the new bearing installation fixture has a long service life. Attached Figure Description

[0010] Figure 1 This is a structural schematic diagram of a new type of bearing mounting fixture.

[0011] Figure 2 This is a cross-sectional structural diagram of a new type of bearing mounting fixture.

[0012] Figure 3 This is a schematic diagram of the bearing stopper.

[0013] Figure 4 This is a schematic diagram of a cylindrical structure.

[0014] Figure 5 This is a cross-sectional view of the tail cover.

[0015] Figure 6 This is a 3D diagram of a new type of bearing mounting fixture (containing bearings).

[0016] Figure 7 This is a 3D view of a new type of bearing installation fixture when installing a bearing into the bearing chamber of a gearbox. Detailed Implementation

[0017] Example 1: Refer to Appendix Figures 1-7A novel bearing installation fixture includes a cylinder 1, a tail cap 2, and a bearing retainer 3. A partition 12 is provided at the front end of a circular through-hole 11 in the cylinder 1. A circular hole 13 is provided on the outer side of the partition 12, penetrating both the inner and outer sides of the partition 12. The center line of symmetry of the circular hole 13 coincides with the center line of symmetry of the circular through-hole 11, and the diameter of the circular hole 13 is smaller than the diameter of the circular through-hole 11. The bearing retainer 3 is composed of a first cylindrical segment 31 and a second cylindrical segment 32, which are integrally formed. The center line of symmetry of the first cylindrical segment 31... The center line and the symmetrical center line of the second cylindrical segment 32 coincide. The diameter of the first cylindrical segment 31 matches the diameter of the circular through hole 11. The diameter of the second cylindrical segment 32 matches the diameter of the circular hole 13, and the length of the second cylindrical segment 32 is greater than the length of the circular hole 13. The rear end of the circular through hole 11 in the cylinder 1 is provided with a tail cap 2. A spring 4 is provided inside the circular through hole 11 of the cylinder 1. One end of the spring 4 abuts against the inner side of the first cylindrical segment 31, and the other end of the spring 4 abuts against the inner side of the tail cap 2. At this time, the front end of the second cylindrical segment 32 extends out of the front end face of the cylinder 1.

[0018] The second cylindrical segment 32 has a threaded through hole 33 on its outer circular surface, and the threaded through hole 33 passes through both sides of the outer circular surface of the second cylindrical segment 32. The center line of symmetry of the threaded through hole 33 is perpendicular to and intersects the center line of symmetry of the second cylindrical segment 32. A ball screw 5 is provided in the threaded through hole 33, and part of the body of the steel ball in the ball screw 5 is exposed on the outer circular surface of the second cylindrical segment 32. Under the action of external force, the steel ball in the ball screw 5 can retract into the threaded through hole 33. At this time, the steel ball spring in the ball screw 5 is compressed by the steel ball. The ball screw 5 is located on the part of the second cylindrical segment 32 that extends out of the cylinder 1.

[0019] The inner side of the round cover 21 in the tail cover 2 is provided with a circular protrusion 22, and the round cover 21 and the circular protrusion 22 are integral structures. The center line of symmetry of the round cover 21 coincides with the center line of symmetry of the circular protrusion 22, and the diameter of the round cover 21 is larger than the diameter of the circular protrusion 22. The diameter of the circular protrusion 22 matches the diameter of the circular through hole 11. The upper end face of the round cover 21 is provided with two round cover through holes 23, and the round cover through holes 23 penetrate the upper and lower end faces of the round cover 21. The two round cover through holes 23 are located on both sides of the circular protrusion 22. The outer circular surface of the cylinder 1 is provided with a protruding ring 14, and the protruding ring 14 is located at the rear end of the cylinder 1. The upper end face of the protruding ring 14 is provided with two screw holes 15. The tail cover 2 is fixedly installed on the cylinder 1 by screws 6 after the circular protrusion 22 and the circular through hole 11 are inserted and matched, and the two round cover through holes 23 are connected to the corresponding screw holes 15 one by one.

[0020] The lower end of the circular protrusion 22 is rounded. The through hole 23 of the circular cover is a countersunk hole. A positioning protrusion 16 is provided on the outer circular surface of the cylinder 1, and the positioning protrusion 16 is located at the front end of the cylinder 1. The diameter of the positioning protrusion 16 matches the diameter of the bearing mounting hole in the reducer housing. The cylinder 1 is made of 16MnCr5 steel, and the bearing stop head 3 is also made of 16MnCr5 steel. The main body of this tooling is made of 16MnCr5 steel and has undergone quenching and tempering treatment, which gives it high surface hardness (HRC58-62) and wear resistance, as well as high low-temperature impact toughness. This tooling is a reusable type, and the head part has a service life of tens of thousands of cycles.

[0021] In use: First, take the bearing (such as a deep groove ball bearing), align the inner ring of the bearing with the protruding part of the tooling (i.e., a new type of bearing installation tooling) (i.e., the bearing retaining protruding part 3), so that the bearing is fitted onto the protruding part of the cylinder 1 in the second cylindrical section 32. During this process, the ball screw 5 on the bearing retaining protruding part 3 can automatically align the center and fix the bearing. Second, verticalize the tooling, align it with the bearing chamber in the reducer housing, and pre-insert the bearing and the positioning convex ring 16 located at the front end of the cylinder 1 into it (the bearing chamber). At this time, the front end of the cylinder 1 serves as a pre-guide. Third, use a manual press to press the tooling all the way in (i.e., press the bearing into place). After the bearing is pressed down, the protruding part (i.e., the bearing retaining protruding part 3) abuts against the gear shaft and retracts towards the cylinder 1. The retracting protruding part (i.e., the bearing retaining protruding part 3) compresses the spring 4 (such as... Figure 7 As shown), until the upper end (small part) of the gear shaft enters the round hole 13 to achieve a guiding transition, at which point the bearing installation without impact damage is completed.

[0022] It should be understood that although the above embodiments provide a relatively detailed textual description of the design concept of this utility model, these textual descriptions are merely simple textual descriptions of the design concept of this utility model, and not limitations on the design concept of this utility model. Any combination, addition, or modification that does not exceed the design concept of this utility model shall fall within the protection scope of this utility model.

Claims

1. A new type of bearing installation tool, comprising a cylinder (1), a tail cover (2) and a bearing stop bullet (3), characterized in that: The front end of the circular through hole (11) in the cylinder (1) is provided with a partition (12), the outer side of the partition (12) is provided with a circular hole (13) which penetrates the inner and outer sides of the partition (12), the center line of symmetry of the circular hole (13) coincides with the center line of symmetry of the circular through hole (11), and the diameter of the circular hole (13) is smaller than the diameter of the circular through hole (11), the bearing bullet head (3) is composed of a first cylindrical segment (31) and a second cylindrical segment (32) which are in an integral structure, the center line of symmetry of the first cylindrical segment (31) coincides with the center line of symmetry of the second cylindrical segment (32), the diameter of the first cylindrical segment (31) matches the diameter of the circular through hole (11), the diameter of the second cylindrical segment (32) matches the diameter of the circular hole (13), and the length of the second cylindrical segment (32) is greater than the length of the circular hole (13), the rear end of the circular through hole (11) in the cylinder (1) is provided with a tail cover (2), the circular through hole (11) of the cylinder (1) is provided with a spring (4), one end of the spring (4) abuts against the inner side of the first cylindrical segment (31), and the other end of the spring (4) abuts against the inner side of the tail cover (2), at this time, the front end of the second cylindrical segment (32) protrudes from the front end surface of the cylinder (1).

2. A novel bearing mounting tool as claimed in claim 1, characterized in that: A threaded through hole (33) is provided on the outer circular surface of the second cylindrical segment (32) and penetrates the two sides of the outer circular surface of the second cylindrical segment (32), the center line of symmetry of the threaded through hole (33) is perpendicular to and intersects with the center line of symmetry of the second cylindrical segment (32), the threaded through hole (33) is provided with a wave bead screw (5), and part of the body of the steel ball in the wave bead screw (5) protrudes from the outer circular surface of the second cylindrical segment (32), the steel ball in the wave bead screw (5) can be retracted into the threaded through hole (33) under the action of external force, at this time, the steel ball spring in the wave bead screw (5) is compressed by the steel ball; the wave bead screw (5) is located in the section of the second cylindrical segment (32) which protrudes from the cylinder (1).

3. A novel bearing mounting tool as claimed in claim 1, characterized in that: The inner side of the circular cover (21) of the tail cover (2) is provided with a circular convex column (22) and the circular cover (21) and the circular convex column (22) are in an integral structure, the center line of symmetry of the circular cover (21) coincides with the center line of symmetry of the circular convex column (22) and the diameter of the circular cover (21) is larger than the diameter of the circular convex column (22), the diameter of the circular convex column (22) matches the diameter of the circular through hole (11), the upper end surface of the circular cover (21) is provided with two circular cover through holes (23) and the circular cover through holes (23) pass through the upper and lower end surfaces of the circular cover (21), the two circular cover through holes (23) are located on the two sides of the circular convex column (22), the outer circular surface of the cylinder (1) is provided with a convex ring (14) and the convex ring (14) is located at the rear end of the cylinder (1), the upper end surface of the convex ring (14) is provided with two screw holes (15), the tail cover (2) is fixedly installed on the cylinder (1) through the screw (6) after the circular convex column (22) and the circular through hole (11) are inserted and matched and the two circular cover through holes (23) and the corresponding screw holes (15) are one-to-one through.

4. A novel bearing mounting tool according to claim 3, characterized in that: The lower end of the circular convex column (22) is rounded.

5. A novel bearing mounting tool as claimed in claim 3, characterized in that: The circular cover through hole (23) is a countersunk hole.

6. A novel bearing mounting tool as claimed in claim 1, characterized in that: The outer circular surface of the cylinder (1) is provided with a positioning convex ring (16) and the positioning convex ring (16) is located at the front end of the cylinder (1), the diameter of the positioning convex ring (16) matches the diameter of the bearing mounting hole in the speed reducer box.

7. A novel bearing mounting tool as claimed in claim 1, characterized in that: The cylinder (1) is made of 16MnCr5 steel.

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